628856 has 8 divisors (see below), whose sum is σ = 1179120. Its totient is φ = 314424.

The previous prime is 628841. The next prime is 628861. The reversal of 628856 is 658826.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39296 + ... + 39311.

It is an arithmetic number, because the mean of its divisors is an integer number (147390).

2⁶²⁸⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

628856 is a deficient number, since it is larger than the sum of its proper divisors (550264).

628856 is a wasteful number, since it uses less digits than its factorization.

628856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78613 (or 78609 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 628856 is about 793.0044136069. The cubic root of 628856 is about 85.6742680923.

The spelling of 628856 in words is "six hundred twenty-eight thousand, eight hundred fifty-six".